Friction draft-rigging for railway-cars.



J. E'. OGGNNQB.

FRIGTION DRAFT RIQGING :FOR RAILWAY GARS.

APPLICATION FILED MAY 11,1908.

J, E. OCONNGR. EMOTION DRAFT RIGGNG TOR RAILWAY GARS.

APPLIOATION FLED MAY11,1908.

Patented Jan. 12, 1909.

2 SHEETS-SHEET z.

W! TNESSES .t

A UNTTED sTATEs PATENT essieu.

JOHN F. OCONNOR, OF CHICAGO, ILLINOIS, ASSIGNOR TO W. H. MINER COMPANY, OF CHICAGO,

- ILLINOIS, A CORPORATION OF ILLINOIS.

IFRICTION DRAFT-REGGING FOR RAILWAY-CARS.

Specification of Letters Patent;

Patented Jan. 12, 1909.

Application led May 11, 19,08. Serial No. 432,017.

'friction draft rigging for railway cars.

My invention consists in the novel construction of parts and devices and in the novel combinations of arts and devices herein shown and descri ed and more par- `elevation part y ticularly speciiedin the claims.

In the accompanying drawing forminga part of this s ecification, Figure 1 is a side in central vertical longitudinal section of a friction draft rigging embodypartly in 'horizontal section.

a lan view Fig. 3 is a cross section on line 3--3 of Fig. 1. Fig. 4 is a detail end view of the wedge and friction blocl'. Fig. 5 is a detail elevation of the wedge. Fig. 6 is a detail front view of one of the friction blocks. Fig. 7 is a detail side elevation of same and Fig. 8 is a detail rear elevation of same.

In the drawing, A represents the center sills or frame members of the car to which the draft'rigging is applied, A1 the front or end sill and A2 the carry-iron.

B is the draw-bar, B1 the draw-bar yoke, C C1 the followers, D D the stop castings or draft lug members, E the spring, E1 a preliminary com ression spring, F a longitudinally movab e friction shell inclosing the spring E, G the segmental friction b ocks,

ing my invention. Fig. 2 is preferably three in number, G1 a pyramidalwedgc, preferably three faced, G2 a preliminary compression follower, G3 anti-friction rollers interposed between the wedging faces of the friction blocks G and' wedge G1 and H a connecting rod between the preliminary compression follower and the friction shell G.

By combining with the friction shell a series of at least three anti-friction rollers and a pyrainidal wedge having at least three faces and a corres onding number of friction blocks, the dilfculty or objection incident to the use of a pair of anti-friction rollers and a two faced wedge and a single pair of friction blocks and the consequent tendency of the wedge pressure to distort the friction shell and to accentuate the wear upon diametricwedging face ramidal Wedge y front end with a recess 91 to receive the ally opposite portions'of the shell and friction b ocks, and to fail to properly release with certainty and reliability is entirely over- The stop castings or draft lug members D are rigidly and firmly secured to the draft sills or frame members A A ofthe car by rivets b andare furnished with stops orshoul- K ders d1 Z1 for the followers C C1 to abut against and also with intermediate stops d3 d* to 'limit the movement of the followers and consequent compression of the springs.

' The friction shell F is preferabl cylindrical in formrand has an interior cy indrical friction face f. The friction shell F is also preferably furnished at its rear end with an' integral annular flange f1 having an annular recess f 2 to receive the flange f s of the recessed cap F which closes the rear end of the friction shell F, and to which one end of the connecting rod H is secured by the threaded nut h, which fits in the'rccess f 4 of the cap F2: The segmental friction blocks G have exterior cylindric friction faces g5 in sliding frictional engagement with the interior friction face of the friction shell F. The segmental friction blocks G are preferably three in numloerl and each is furnished with an inclined or g having a shoulder gto retain in place the anti-friction roller Ga which is inter osed between the segmental friction block and the wedge G1. The wedge G1 is yramidal and corresponds in the number of its-wedging faces gs to the number of segmental friction blocks G. As illustrated 1n the drawing, the pyramidal wedge Gr1 has three inclined or wedging faces g8, this being the preferred construction. Each of the inclined or wedging faces q8 ofthe wedge G1 is furnished with a shoulder g9 to retain the.` anti-friction rollers G3 in place. The py- G1 is further provided at its shouldered end or guide gn of the preliminary compression block or follower G2. The preliminary compression spring E1 is interposed between the pyramidal liminary compression block or follower G2 so that this preliminary compression spring may properly cushion light blows or shocks without bringing ression follower ramid al We dge G1 and thus limits the compres- Wedge G1 andthe prethe 'frictional resistance mechanisin into action. The preliminary com- G2 is furnished with a stop sion of the preliminary compression spring l rod lll fits in thecentral recess gll of the preliminary compression follower or block G?. The stop castings or draft lug members l) are preferably furnished on their inner faces ivith curved guide walls for the friction shell F and with guide members d6 for the upper limb or member of the draft yoke B1.

v by bolts K1.

l is a tie plate extending between l,the draft sills A A and removably secured thereto The tie plate K provided With a central longitudinal depressed portion l@ to receiveI and guide the lower member of the draft yoke B1. The anti-friction rollers G have conical or beveled ends g, 1which fit together at the meeting ends of-two adjacent angularly placed rollers. The beveled projecting ends of the rollers G thus cause the rollers to hold each other centrally in place.

The connecting rod H vwith itsthreaded. nut l1, serves not only as a means for holding the spring and frictional cushioning devices .l of the draft rigging all connectedy togetheri '35 and in assembled position, but it alsoiserves to hold the springs under an initial teiision and as a means for adjustment of the spring frictional resistance mechanism to ytake .up

As in my invention the triangular co tive arrangement of the rollers causes t lern, in connection with the pyramidal Wedge anr;

n l The preliminary com ression. follower cagnes the co-'acting faces of the friction blocks, to automatically retain said rollers in their central position about the Wedge, .it is unneces-v sary to provide the friction shell and friction blocks with means for preventing the latter from turning in the friction shell. The friction blocks being thus left free to turn inthe friction shell, thus enables the'wear to take place uniformly over the entire interior cylindrio friction face of the shell. 4

l claim n" 1. In a friction draft rigging, the combination"With the draWbar, draft rigging, draft lugs and followers, of a longitudinally movable friction shell having an internal cylindric friction face, a springtherein, a series of friction blocks having external cylindric fric'- tion faces and interior Wedging faces, a pyi ramidal Wedge having a series of inclined faces, a series of angdlarly disposed anti-friction rollersv interposed between the Wedging faces of said segmental friction blocks` and said pyramidal Wedge, substantially as specified.

2. ln a friction draft rigging, the combinaanti-friction rollers interposed between the' Wedging faces of said segmental friction blocks and said pyramidal Wedge, said antifriction rollers having beveled meeting `ends',

and cooperating to maintaineach other in place, substantially as'specified.

' JoHN- r. oooNNon.

.Y Witnesses i I EDMUND Anoooir PEARL ABRAMs. 

